The O-Ring, cataloged under National Stock Number 5331-00-285-9871, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Hale Products, Inc.. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-285-9871 |
| Primary Part Number | HN40PC42 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Hale Products, Inc. |
| Status | ACTIVE |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Center Hole Diameter | 1.181 INCHES MINIMUM AND 1.193 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| HN40PC42 PRIMARY | Hale Products, Inc. (USA) |
| HN39PC42 PRIMARY | Hale Products, Inc. (USA) |
| HN37PC106 PRIMARY | Hale Products, Inc. (USA) |
| HN33PC106 PRIMARY | Hale Products, Inc. (USA) |
| HN32PC106 PRIMARY | Hale Products, Inc. (USA) |
| HN42PC42 PRIMARY | Hale Products, Inc. (USA) |
| 3P750 PRIMARY | Hale Products, Inc. (USA) |
| Reference | Meaning |
|---|---|
| HN32 106 | 5/9 Secondary reference Hale Products, Inc. |
| PD5330-228-17 | 5/9 Secondary reference U.S. Government activity |
| HN33 106 | 5/9 Secondary reference Hale Products, Inc. |
| HN37 106 | 5/9 Secondary reference Hale Products, Inc. |
| HN42 42 | 5/9 Secondary reference Hale Products, Inc. |
| HN40 42 | 5/9 Secondary reference Hale Products, Inc. |
| HN39 42 | 5/9 Secondary reference Hale Products, Inc. |
NSN 5331-00-285-9871 is a O-Ring, manufactured by Hale Products, Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-285-9871 has 7 manufacturer part numbers on file: HN40PC42 (Hale Products, Inc.), HN39PC42 (Hale Products, Inc.), HN37PC106 (Hale Products, Inc.), HN33PC106 (Hale Products, Inc.), HN32PC106 (Hale Products, Inc.) and 2 more.
1 possible match (shared part number, not a government interchangeability claim): 2520-01-059-9320. Verify interchangeability with system specifications before substitution.
Key specifications for HN40PC42: Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Center Hole Diameter: 1.181 INCHES MINIMUM AND 1.193 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 3 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.